Light : This lovely is low light tolerant. Partial shade will do her best. Just be careful to keep her out of direct sun.
Water: Keep the soil slightly moist. You never want to soil to dry out. Give it a thorough watering but make sure its not sitting in any water. Soggy soil can cause root rot.
Humidity: Calatheas love humidity. You can group her with other plants, pop her in the bathroom or kitchen. You can also mist her.
Temperature: Keep this lady warm. She will not thank you for a draught.
Food: Not to be fed in winter, but you could indulge your Calathea Lancifolia with some half strength fertiliser in the growing months.
Toxicity: Yay! Calatheas are pet friendly.